Brake-facing.



G. J. COLEMAN. BRAKE FAGING.

` APPLIoATIoN Hmm nov. 1, 19o?.

Patented May 23, 1911.

2 SHEETS- SHEET 1.

\`/'\"." r, uw

C. J. COLEMAN.

BRAKE PAOING.

APPLIoATloN FILED Nov. 1, 19o?.

993,031 Patented May 23, 1911.

2 SHEETS-SHEET 2.

or filling cords.

To'all lwhom 'it may concern:

CLYDE J. COLEMAN, or NEW YORK,

Specification of Letters Patent.

N. Y., ASSIG-NOR T0 CONRAD HUBERT, 0F NEW YORK, N. Y.

BRAKE-FACING.

Patented May 23, 1911.

, Application led November 1, 1907. Seria1 No. 400,208.

Be it known that I, CLYDE J. COLEMAN, a citizenof the United States,residing at the borough of Manhattan, city of New York, in the county ofNew York and State of New York, have invented a certain new and usefulImprovement in Brake-Facings, of which vthe following is aspecification, reference being had therein to the accompanying drawings,forming part thereof.

My inventionrelates generally to braking devices and relatesparticularly to the brakes of automobiles, and the obj ects of minvention are simplicity, durability and e c-iency.

Other objects and advantages will be apparent from the followingdescription.

*My invention includes asbestos fibers held in place by wires interlacedtherewith to form a Abrake facing.

My invention also includes various details of construction. My inventionwill now be described with reference to the .accompanyin drawings, afterwhich I will point out my lnvention in claims.

Figure 1 is a plan view of a portion of brake facing, broken away at theends. Fig. 2 is a transverse section on the line 2-K-2 of Fig. 1. Fig. 3is a view similar .to Fig. 2 be ore the strip of fabric is compressed orfelted. Fig. 4 is a detail of one of the warp cords. Fig. 5 is a detailof one of the weft Fi 6 is a detail of a modified construction.. ig. 7is an elevation showing my invention fas embodied in a band brake. Fig.8 i's a sectional elevation of the brake band or brake strap shown inFig. 7 as viewed from the left. Fig. 9 is an elevation showingmyinventionas embodied in an internal brake. Fig. 10 is an elevation ofthe brake band or brake shoe shown in Fig. 9 asfviewed from the side.

In the illustrated embodiments of my invention a brake facin is showncom rising a stri from interwoven or interlaced cords. Each cord is madeup of a plurality of strands twisted together,and each strand -iscomposed of asbestos fibers and a wire. In the preferred constructioneach strand is composed of a yarn or string 3 of asbestos fibers and awire 4,' the asbestos yarn and the wire being intertwisted or twistedtogether to of double se vaged fabric ormed form a strand 5, asindicated in Figs. 4 and 5. In Fig. 4 four strands 5 are intertwisted ortwisted together to form a warp cord or longitudinal cord 6, and in Fig.5 three strands 5 are similarly combined or intertwisted to form a weftor filling cord 7. The warp cords 6 and weft cords 7 are woven togetherto form a fabric, as indicated in Figs. 1, 2 and 3. This fabric ispreferably in the form of a strip having selvage edges and of a widthcorresponding to the width of the brake shoe or brake stra T e weaveshown in the drawings is that known as basket weave, but the particularnature of the weave is immaterial, and it is likewise immaterial as tothe number of strands forming a cord of the warp or weft. It is onlynecessary that the fabric should be firm and compact. To render thebrake fabric more compact and to give it a smooth surface subject toeven friction and wear the fabric should be rolled or otherwisecornressed or felted. The `appearance of the reshly woven fabric beforefelting or compacting is indicated at Fig. 3, while the smooth compactedor felted brake-facing material or fabric is shown at Fig. 2.

In the modified construction shown in Fig. 6 the cord 8 from which thebrake fabric or brake facing is woven is composed of intertwistedstrands 9 of a sli -tly differet nature or construction. Eac strand v9is composed of a wire core 10 and'a number (shown as two) of asbestosfiber yarns or strings 11 wound about or around and covering the core10. It is largely immaterial whether this modified construction or thatfirst described be employed. The first is simpler and more convenient ofmanufacture.

A strip or band of fabric such as has been described is shown asemployed as a facing 12 for a brake band 1,3 of a band brake (Figs. 7and 8). The facing 12 is secured to t e supporting band or brake strap13 by rivets 14 located at regularly spaced intervals and in sufficientnumber to furnish firm band 13 together with the flexible facing 12 losis contracted to grip a friction pulley or friction disk 15 by a bellcrank lever 16, pivoted to one end of the band 13 and having a fulcrumpivot pin 17. Ther lever 16 is connected to the other end ofthe yband 13by a link 18 provided with adjusting nuts 19. The lever may bel actuatedto apply or release the brakeby an operating rod 2,0.

In Figs. 9 and 10 a brake facing 21 of the above described construct-ionis shown as ape plied to a brake shoe 22 of an internal brake, adaptedto act on the inside, of the rim of a gear 23, and the facing is'lsecured tothe shoe by rivets 24. The brake actuating mechanism is wellknown and need be onlyv briefly described. The brake shoe 22 is to someextent flexible and is supported on a pivot 25. The shoe 22 may beexpanded or contracted, to apply or release the brake, by a bell cranklever 26, connected to the ends of the shoe 22 by links 27. a

Brakes of the form shown and above described are commonly employed onautomobiles. The conditions of service on -automobile brakes are verysevere, and the b rake facing of my invention is intended especially tosatisfactorily meet severe conditions of service and hard usage. vIt isstronglyadhesive to the coacting surface and oil will not destroy itsgripping qualities. It is durable under heavy rubbing friction, and is yheat-resisting and cannot be destroyed by frictionv heat resulting fromapplication of the brake. It is flexible, and therefore may bey applied,orsecured to a brake shoe or brake band of any curvatureor'gconformation. Itis ineiitensible, and-therefore will always. presenta 'smooth even braking sur face. 'The interwover'wiies impart strengthand inextensibility' and also firmly grip and retain or hold captive theintertwisted or interlaced asbestos bers, and the asbestos fibersprovide a' durable, heat-resisting grip-f ping or braking surface.As'shown in the drawings, especially in Figs. 1 and 5, the interlacedwires are embedded, or sunken, in the asbestos fibers and, being soconcealed, do not contact with the brake surface.

Itis obvious that various modifications may be made in the constructionsshown and above particularlydscribed within the principle and scope ofmy invention. f

l. A brake facing comprising asbestos,` fibers andA wires interlacedtherewith.

2. A brake facing` `comprising asbestos fibers and continuous wiresinterlaced therewith.

3. A brake facing comprising interlaced threads, each thread'comprisinga wire and a yarn of asbestos bers twisted together.

4. A brake facing comprising interlaced strands, each strand comprisingasbestos bers and wire.

5. A brake facing .comprising interlaced asbestos bers and a continuousWire interstrands, each strand comprising asbestos fibers and acontinuous wire. 6. A brake facing consisting of a fabric comprisinginterlaced cords, each cord comprising strands and each strandcomprising asbestos fibers and a continuous wire.

7. A brake facing consisting of a fabric comprising interlaced cords,each cord coml prising strands and each strand comprising twistedwiththe asbestos bers.

8. A brake facing consisting of a fabric comprising cords woventogether, each cord comprising strands and each strand coinprisingasbestos bers and a continuous wire.

9. A brake facing consisting of a fabric comprising cordswoven-together, each cord comprising intertwisted strands and eachstrand comprising asbestos bers and a continuous wire intertwisted withthe asbestos fibers.

10. A brake facing consisting of a felted fabric comprising interlacedcords, each cord comprising strands and each strand comprising asbestosbers and a continuous wire. f

11. A .brake facing consisting of a felted fabric comprising interlacedcords, each cord comprising.v strands andV each strand comprisingasbestos fibers and a continuous wire.

12. A brake facing consisting of a double-1 selvaged fabric comprising'-interlaced asbests' fibersl and wires.A 'N

13. A brake facing comprising asbestos bers and wires interlacedtherewith and concealed in the asbestos bers.

14. A brake facing consisting of a fabric comprising-interlaced cords,each cord com# 105 prising strands and each strand comprising .asbestosbers anda continuous wire inter twisted with theK asbestos bers andconcealed in the asbestos fibers.

15. A brake facing consisting of a double- 110 selvaged fabriccomprising interlaced asbestos fibers and wires, the wires beingconcealed in the asbestosbers.

`16. A band brakelining formed pressible woven asbestos ber.

17. A brake band formed of of com? A 'p 115 compressible voven vasbestostextile fabric.

L. 18. Asan article of manufacture,'a brake lining comprising anasbestos fabric and a metallic reinforce.

1.9.- As an article of manufacture, a brake lining comprising anasbestos fabric and metallic strands incorporated therewith.

f 2.0. As an article of manufacture, a brake lining comprisingsuperposed Nlayers of 125 fabric formed of bers of asbestos andrevinforcing metallic strands.

In a friction device for machine brakes, the combination with a frictionsheet comprising an rasbestos fabric and a 136 metallic reinforce, ofholding means for In testimony whereof I aiX my signa.- said sheet. f fture in presence of two Witnesses.

22. In a rietion device or machine brakes, the combination with afriction sheet CLYDE J' COLEMAN' 5 com rising an asbestos fabric and ametallic lVltnesses:

rein orce, of backing andholding means WM. ASHLEY KELLY,

supporting said sheet.- BERNARD COWEN.

